Condemned inmate William Castillo, who until now has declined to file appeals that could keep him alive, joined Wednesday in a state Supreme Court challenge of Nevada's lethal injection execution procedure.The move by Castillo, represented by federal public defenders Mike Pescetta and Gary Taylor, was welcomed by the American Civil Liberties Union of Nevada, which had filed the challenge in October when Castillo was scheduled to die."This is a total surprise to us," said Lee Rowland of the Nevada ACLU, adding, "We're very glad that our lawsuit gave Mr. Castillo the time to reconsider and decide not to volunteer for …